Recently a Skype worm started going around, it is Backdoor.Win32.Hupigon it works like the old A.I.M Trojans, the more people who open it the more people it messages/infects. You will get a message from any person with the Trojan as seen below.

lol is this your new profile pic? [http://goo. gl/QYV5H?img=YOURSKYPENAME]